Search: Posts Made By: mcollinstn
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Forum: General Q & A 11-17-2017, 09:59 PM
Replies: 23
Views: 1,619
Posted By mcollinstn
Your existing hydraulic flat specs at 233/241 on...

Your existing hydraulic flat specs at 233/241 on 110.
And you are considering a hyd roller at 236/242 on 110?

Your Voodoo has fairly fast ramps for a flat hydraulic and 554/572 lift.
The Comp HR...
Forum: General Q & A 07-28-2017, 07:37 PM
Replies: 6
Views: 535
Posted By mcollinstn
An HP500 with 600 hours on the original...

An HP500 with 600 hours on the original valvesprings is just waiting to ruin your pocket.
How to know if they've been changed? Well, the valve covers would definitely need to come off, but you CAN...
Forum: General Q & A 07-28-2017, 07:27 PM
Replies: 24
Views: 4,953
Posted By mcollinstn
I've roasted a lot of amplifiers. Each and...

I've roasted a lot of amplifiers.
Each and every roasted amplifier was damaged by heat.
Forum: General Q & A 07-28-2017, 07:24 PM
Replies: 86
Views: 2,905
Posted By mcollinstn
Loose end connector on the wire from battery to...

Loose end connector on the wire from battery to trim pump.
Check all wires and connections.
Forum: General Q & A 07-28-2017, 07:22 PM
Replies: 57
Views: 1,854
Posted By mcollinstn
Your pump should supply around 42-45 psi to the...

Your pump should supply around 42-45 psi to the rails under full load at wide open throttle.
If you are getting less than that under WOT conditions, then you are starving your motor for fuel.
...
Forum: General Q & A 06-23-2017, 03:41 PM
Replies: 9
Views: 367
Posted By mcollinstn
Okay, first the boat pulled to one side while...

Okay, first the boat pulled to one side while tachs showed 3900 port and 5100 stbd yet top speed was no slower than before?
And boat tracked straight when both motors showed 3900.
Am I correct?
...
Forum: General Q & A 06-23-2017, 01:37 PM
Replies: 15
Views: 1,196
Posted By mcollinstn
I'm perfectly happy occasionally adjusting lash...

I'm perfectly happy occasionally adjusting lash and visually inspecting my setup VS dropping $1k on hydraulic specialty lifters and trusting the gods at 7,200rpm.
BBC valvetrain is not particularly...
Forum: General Q & A 06-23-2017, 01:26 PM
Replies: 9
Views: 367
Posted By mcollinstn
I'm confused. If wide open throttle results in...

I'm confused.
If wide open throttle results in 3800-3900 rpm on your port motor, then HOW are you matching the revs at 4,000 ?
Are you having MadMax spit nitro down the carb throat?

Help ME...
Forum: General Q & A 06-23-2017, 12:56 PM
Replies: 16
Views: 747
Posted By mcollinstn
I've got a drawer full of old spark plugs that I...

I've got a drawer full of old spark plugs that I broke the insulator off of, tapped the ID and put a bolt into to serve as a piston stop for TDC reference. When I have a new motor in front of me to...
Forum: General Q & A 06-21-2017, 11:41 AM
Replies: 15
Views: 1,196
Posted By mcollinstn
Short bursts, you can get away with a lot. And...

Short bursts, you can get away with a lot.
And as far as 7,000 rpm, I would assume you are talking about relatively short runs (30 seconds or less).
Running a constant-load at 7,000 rpm in a...
Forum: General Q & A 06-21-2017, 11:30 AM
Replies: 4
Views: 242
Posted By mcollinstn
Do you have a GAUGE hooked to the temp sensor? ...

Do you have a GAUGE hooked to the temp sensor?
It would be helpful to know if you are actually getting an overtemp situation or just an erratic sensor signal.

As stated, many Merc control boxes...
Forum: Formula 06-13-2017, 12:27 PM
Replies: 17
Views: 860
Posted By mcollinstn
I dunno if I start sending specifics if I will...

I dunno if I start sending specifics if I will get in trouble for not linking it to the Classifieds. I saw that we aren't supposed to try to sell things without it already being in the classifieds....
Forum: Formula 06-12-2017, 10:24 PM
Replies: 49
Views: 3,115
Posted By mcollinstn
My 311 with 502 Mags and Bravos with Mirages. I...

My 311 with 502 Mags and Bravos with Mirages.
I always kept the nose light. Anything heavy was stored as far aft as possible.
Anything less than 40 mph, Drives "just up from full down" (like 1)....
Forum: Formula 06-12-2017, 10:00 PM
Replies: 17
Views: 860
Posted By mcollinstn
My '91 311SR1

The guy who bought my '91 311 a few years ago has moved up to a larger boat for going slower and sleeping more people.
The boat's still sweet, and very available.
I've got no dog in this hunt, but...
Forum: General Q & A 06-05-2017, 07:32 PM
Replies: 3
Views: 325
Posted By mcollinstn
Let's make sure we are talking about the same...

Let's make sure we are talking about the same thing.
The only time you can determine if one engine is "running slower" than the other is when they are under full throttle. Any other time could be...
Forum: General Q & A 05-29-2017, 01:49 PM
Replies: 143
Views: 13,941
Posted By mcollinstn
I stopped reading on page 7. Dunno where all you...

I stopped reading on page 7. Dunno where all you went from there but here are some thoughts.Correction - I jumped ahead to the end.

A Mercruiser 454Mag or 454/330 would last about 5 times longer...
Forum: General Q & A 05-29-2017, 01:10 PM
Replies: 27
Views: 1,444
Posted By mcollinstn
Check the top Gimbal bearings. Your drives may be...

Check the top Gimbal bearings. Your drives may be about ready to fall off.
Also, check the steering assist valve for smooth action and all of the internal tie bar and joints.
Finally, make sure the...
Forum: General Q & A 05-29-2017, 01:07 PM
Replies: 6
Views: 452
Posted By mcollinstn
"Sounddown" 2" foam is AWESOME at killing medium...

"Sounddown" 2" foam is AWESOME at killing medium to high frequency sound.
I have Caterpillars in a sport cruiser and while I love turbo whine and mechanical noise, it was vicious on that boat....
Forum: General Q & A 05-29-2017, 12:57 PM
Replies: 16
Views: 2,709
Posted By mcollinstn
You talking about "lope" or "surge" at idle/low...

You talking about "lope" or "surge" at idle/low speeds?

Several things come into play.

1) Centrifugal timing advance - if your advance springs are letting the weights move anywhere in the "idle...
Forum: General Q & A 05-28-2017, 05:13 PM
Replies: 5
Views: 376
Posted By mcollinstn
I'm gonna guess that you haven't tried running...

I'm gonna guess that you haven't tried running this yet?
My prediction is that you can't run over 30/32 degrees timing on 92 octane without detonation unless your cam is already too big.
(Unless...
Forum: General Q & A 05-28-2017, 03:32 PM
Replies: 6
Views: 374
Posted By mcollinstn
Since this is "out of pocket" money, I assume you...

Since this is "out of pocket" money, I assume you purchased used instead of new (warranty).
ANY preowned purchase should be preceded by some research into common model-specific problems. ESPECIALLY...
Forum: General Q & A 05-05-2017, 03:35 PM
Replies: 49
Views: 3,845
Posted By mcollinstn
Iron cam gear = melonized distributor gear. ...

Iron cam gear = melonized distributor gear.
Steel cam gear = bronze distributor gear.

Most Crane hyd rollers have pressed on iron gears, but others will have to verify that part number.

Merc...
Forum: General Q & A 05-05-2017, 03:23 PM
Replies: 19
Views: 829
Posted By mcollinstn
Any fitting that would dump into the carb throat....

Any fitting that would dump into the carb throat.
You can drill thru the side of the choke horn just below the flame arrestor flange and press in a brass tube fitting.
As several have stated, it...
Forum: General Q & A 04-22-2017, 09:52 AM
Replies: 57
Views: 2,557
Posted By mcollinstn
Why a dominator with such a small cam and intake?

Why a dominator with such a small cam and intake?
Forum: General Q & A 04-22-2017, 09:49 AM
Replies: 67
Views: 4,530
Posted By mcollinstn
Got the video to work. Sound is in the valve...

Got the video to work. Sound is in the valve train - not bottom end. Bolt-down (non adjustable) rockers can only "gain" clearance by the following:
Lost a cam lobe
Collapsed lifter
Bent pushrod...
Showing results 1 to 25 of 500



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